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Topic: No Heat in Dryer (Read 4479 times)

I have a Whirlpool Dryer, model LGT7646EQ3, manufactured 1999. It is a gas dryer, not electric. The electronics work fine, buzzer fine, door fine, all of a suden, there is absolutely no heat in the unit.

First time fooling around with trying to fix a dryer. I figured it might be the ignitor (I have replaced them on ovens). I replaced it, but still no heat.

Looking over the parts list, the only other part that may make sense is the Thermal Fuse.

The flame sensor must have continuity or the glow thingy won't ignite. The way it works is when the dryer starts up and the drum is cool the control thermostat sends 120 volts into the gas assembly and fires up the glowbar, flame sensor, and the operating coils all at once. The glow thingy comes on, but the gas will not yet ignite. Why? Because that glow thingy is robbing all of the power necessary to yank open the floodgates; so what happens is we need to find a way to shut down the glowthingy and open them gates. How do they do it? With a flame sensor! The flame sensor has a bi-metal in it which when it is cool it lets that there igniter come on. As the igniter warms up the bi-metal inside the flame sensor starts to bend. When it gets too hot for that bi-metal it shuts down the glow thing! Then what happens? All of the power rushes into those operating solenoids, they snatch up the gates and the raw gas flows freely onto that now smouldering hot glow bar and Kawhoosh you have flames. Got any marshmellows? When the flame comes on the heat is transferred to the rotating drum and out the blower vent. IF the vent has a restriction then the FUSE that is mounted on the blower housing next to the controling thermostat will blow and kill the 120 volts which go to that gas assembly. When working normally the controling thermostat will shut down power to the gas assembly all during the drying cycle.

« Last Edit: September 25, 2008, 04:59:57 PM by JWWebster »

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About the icons: The beer is tip link, if a tech saves ya some money buy em a 6 pack. The small green square=personal message. The green dot is a link to my web page on appliance repair and other general BS I love to post. The letter sends me email.I love fan letters! LOL

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May the hinges of our friendship never grow rusty.

About the icons: The beer is tip link, if a tech saves ya some money buy em a 6 pack. The small green square=personal message. The green dot is a link to my web page on appliance repair and other general BS I love to post. The letter sends me email.I love fan letters! LOL